Phosphodiesterase Type 5 Is Highly Expressed in the Hypertrophied Human Right Ventricle, and Acute Inhibition of Phosphodiesterase Type 5 Improves Contractility
نویسندگان
چکیده
منابع مشابه
Phosphodiesterase type 5 is highly expressed in the hypertrophied human right ventricle, and acute inhibition of phosphodiesterase type 5 improves contractility.
BACKGROUND Sildenafil was recently approved for the treatment of pulmonary arterial hypertension. The beneficial effects of phosphodiesterase type 5 (PDE5) inhibitors in pulmonary arterial hypertension are thought to result from relatively selective vasodilatory and antiproliferative effects on the pulmonary vasculature and, on the basis of early data showing lack of significant PDE5 expression...
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Phosphodiesterase type 5 (PDE5) was first discovered in the mid 1970s, not as a PDE but rather as a binding protein for cGMP.1 Shortly thereafter, it became clear that this protein also had cGMP-selective PDE activity, and cGMP-binding to domains in the N-terminus (GAF domains) regulated its enzymatic activity.2 PDE5 gained more attention in the mid 1980s when its role in modulating vascular to...
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Of the molecules that transmit an extracellular message to alter cardiomyocyte physiology, the cyclic nucleotides are among the better understood as regulators of cell function. The relatively recent identification of nitric oxide (NO) as a stimulus of cGMP production by soluble guanyl cyclase,1 as well as of the natriuretic peptides as a stimulating membrane-bound guanylate cyclase,2 has led t...
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There are no published controlled clinical trials of regular phosphodiesterase type 5 inhibitor therapy as a long-term treatment of hypertension. In a randomized, double-blind, 2-way crossover study, 25 otherwise untreated hypertensive subjects were administered 50 mg of sildenafil or matched placebo 3 times daily for 16 days, and the effects on ambulatory blood pressure (BP), clinic BP, arteri...
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ACE (angiotensin-converting enzyme) inhibitors and PDE5 (phosphodiesterase type 5) inhibitors have each been reported to improve endothelial function in cardiovascular disease patients, but the comparative and combined effects of these two classes have not been studied previously. We sought to characterize the acute effects of ramipril alone, sildenafil alone, or their combination on endothelia...
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ژورنال
عنوان ژورنال: Circulation
سال: 2007
ISSN: 0009-7322,1524-4539
DOI: 10.1161/circulationaha.106.655266